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Traffic signal guidance for decisions that work in the field.

Practical articles for specifying, installing, protecting and maintaining LED traffic signal systems—from first RFQ to long-term operation.

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LED traffic signal installation at an urban intersection

Use a structured comparison of equipment, installation, energy and maintenance costs to choose the right power approach for your project conditions.

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Latest technical guides

Direct, field-relevant answers from the GAOQIAO engineering team.

Traffic Signal Countdown Interface Guide

Compare learning, pulse and serial countdown interfaces and define controller behavior before ordering a countdown display.

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Portable Signal Rental Fleet Return Inspection

Create a repeatable inspection, cleaning, configuration reset and release record for returned portable traffic signals before they re-enter a rental fleet.

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